add lower-constraints job

Create a tox environment for running the unit tests against the lower
bounds of the dependencies.

Create a lower-constraints.txt to be used to enforce the lower bounds
in those tests.

Add openstack-tox-lower-constraints job to the zuul configuration.

See http://lists.openstack.org/pipermail/openstack-dev/2018-March/128352.html
for more details.

Change-Id: Iac4a202a1d723822d10f4d34a397eff9de3f2108
add the job in project-config:
Depends-On: https://review.openstack.org/555034
remove branch optimiazation in check and add swift exclusions (series):
Depends-On: https://review.openstack.org/560109
Signed-off-by: Doug Hellmann <doug@doughellmann.com>
Co-Authored-By: Nguyen Hai <nguyentrihai93@gmail.com>

.zuul.yaml

@@ -143,6 +143,7 @@
         - swift-tox-func-ec
         - swift-tox-func-s3api
         - swift-probetests-centos-7
+        - openstack-tox-lower-constraints
     gate:
       jobs:
         - swift-tox-py27
@@ -152,6 +153,7 @@
         - swift-tox-func-domain-remap-staticweb
         - swift-tox-func-ec
         - swift-tox-func-s3api
+        - openstack-tox-lower-constraints
     experimental:
       jobs:
         - swift-tox-py27-centos-7

lower-constraints.txt

@@ -0,0 +1,89 @@
+alabaster==0.7.10
+asn1crypto==0.24.0
+Babel==2.5.3
+bandit==1.1.0
+boto==2.32.1
+castellan==0.13.0
+certifi==2018.1.18
+cffi==1.11.5
+chardet==3.0.4
+cliff==2.11.0
+cmd2==0.8.1
+coverage==3.6
+cryptography==1.6
+debtcollector==1.19.0
+dnspython==1.14.0
+docutils==0.11
+dulwich==0.19.0
+enum-compat==0.0.2
+eventlet==0.17.4
+extras==1.0.0
+fixtures==3.0.0
+flake8==2.5.5
+future==0.16.0
+gitdb2==2.0.3
+GitPython==2.1.8
+greenlet==0.3.1
+hacking==0.11.0
+idna==2.6
+imagesize==1.0.0
+iso8601==0.1.12
+ipaddress==1.0.16
+Jinja2==2.10
+keystoneauth1==3.4.0
+keystonemiddleware==4.17.0
+linecache2==1.0.0
+lxml==3.4.1
+MarkupSafe==1.0
+mccabe==0.2.1
+mock==2.0
+monotonic==1.4
+msgpack==0.5.6
+netaddr==0.7.19
+netifaces==0.5
+nose==1.3.7
+nosehtmloutput==0.0.3
+nosexcover==1.0.10
+openstackdocstheme==1.11.0
+os-api-ref==1.0.0
+os-testr==0.8.0
+oslo.config==4.0.0
+oslo.i18n==3.20.0
+oslo.serialization==2.25.0
+oslo.utils==3.36.0
+PasteDeploy==1.3.3
+pbr==3.1.1
+pep8==1.5.7
+prettytable==0.7.2
+pycparser==2.18
+pyeclib==1.3.1
+pykmip==0.7.0
+pyflakes==0.8.1
+Pygments==2.2.0
+pyparsing==2.2.0
+pyperclip==1.6.0
+python-keystoneclient==2.0.0
+python-mimeparse==1.6.0
+python-subunit==1.2.0
+python-swiftclient==3.2.0
+python-openstackclient==3.12.0
+pytz==2018.3
+PyYAML==3.12
+reno==1.8.0
+requests==2.14.2
+requests-mock==1.2.0
+rfc3986==1.1.0
+six==1.9.0
+smmap2==2.0.3
+snowballstemmer==1.2.1
+Sphinx==1.6.2
+sphinxcontrib-websupport==1.0.1
+stestr==2.0.0
+stevedore==1.28.0
+testtools==2.3.0
+traceback2==1.4.0
+unittest2==1.1.0
+urllib3==1.22
+voluptuous==0.11.1
+wrapt==1.10.11
+xattr==0.4

tox.ini

@@ -150,3 +150,12 @@ commands = bindep test
 [testenv:releasenotes]
 deps = -r{toxinidir}/doc/requirements.txt
 commands = sphinx-build -a -W -E -d releasenotes/build/doctrees -b html releasenotes/source releasenotes/build/html
+
+[testenv:lower-constraints]
+# FIXME(dhellmann): We'll want to uncomment this
+# when the full test suite works with python 3.
+# basepython = python3
+deps =
+  -c{toxinidir}/lower-constraints.txt
+  -r{toxinidir}/test-requirements.txt
+  -r{toxinidir}/requirements.txt